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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82b5a4459a4901351aa6b8f1477ec1a18e591b6c07113778b8b349191519622e' 
  AND token = 'Ir/RIG+Nv9Keg9dR3959s9/MT4PSOyISnQJWlr5rirc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}